RT Journal Article SR Electronic T1 LY-CoV555, a rapidly isolated potent neutralizing antibody, provides protection in a non-human primate model of SARS-CoV-2 infection JF bioRxiv FD Cold Spring Harbor Laboratory SP 2020.09.30.318972 DO 10.1101/2020.09.30.318972 A1 Bryan E. Jones A1 Patricia L. Brown-Augsburger A1 Kizzmekia S. Corbett A1 Kathryn Westendorf A1 Julian Davies A1 Thomas P. Cujec A1 Christopher M. Wiethoff A1 Jamie L. Blackbourne A1 Beverly A. Heinz A1 Denisa Foster A1 Richard E. Higgs A1 Deepa Balasubramaniam A1 Lingshu Wang A1 Roza Bidshahri A1 Lucas Kraft A1 Yuri Hwang A1 Stefanie Žentelis A1 Kevin R. Jepson A1 Rodrigo Goya A1 Maia A. Smith A1 David W. Collins A1 Samuel J. Hinshaw A1 Sean A. Tycho A1 Davide Pellacani A1 Ping Xiang A1 Krithika Muthuraman A1 Solmaz Sobhanifar A1 Marissa H. Piper A1 Franz J. Triana A1 Jorg Hendle A1 Anna Pustilnik A1 Andrew C. Adams A1 Shawn J. Berens A1 Ralph S. Baric A1 David R. Martinez A1 Robert W. Cross A1 Thomas W. Geisbert A1 Viktoriya Borisevich A1 Olubukola Abiona A1 Hayley M. Belli A1 Maren de Vries A1 Adil Mohamed A1 Meike Dittmann A1 Marie Samanovic A1 Mark J. Mulligan A1 Jory A. Goldsmith A1 Ching-Lin Hsieh A1 Nicole V. Johnson A1 Daniel Wrapp A1 Jason S. McLellan A1 Bryan C. Barnhart A1 Barney S. Graham A1 John R. Mascola A1 Carl L. Hansen A1 Ester Falconer YR 2020 UL http://biorxiv.org/content/early/2020/10/01/2020.09.30.318972.abstract AB SARS-CoV-2 poses a public health threat for which therapeutic agents are urgently needed. Herein, we report that high-throughput microfluidic screening of antigen-specific B-cells led to the identification of LY-CoV555, a potent anti-spike neutralizing antibody from a convalescent COVID-19 patient. Biochemical, structural, and functional characterization revealed high-affinity binding to the receptor-binding domain, ACE2 binding inhibition, and potent neutralizing activity. In a rhesus macaque challenge model, prophylaxis doses as low as 2.5 mg/kg reduced viral replication in the upper and lower respiratory tract. These data demonstrate that high-throughput screening can lead to the identification of a potent antiviral antibody that protects against SARS-CoV-2 infection.One Sentence Summary LY-CoV555, an anti-spike antibody derived from a convalescent COVID-19 patient, potently neutralizes SARS-CoV-2 and protects the upper and lower airways of non-human primates against SARS-CoV-2 infection.Competing Interest StatementM.J.M. has research grant funding from NIH/NIAID, Pfizer, and Sanofi; and personal fees from Meissa Vaccines, Inc. B.E.J., P.LB., J.D., T.P.C., C.M.W., J.L.B., B.A.H., R.E.H., D.B., D.F., M.H.P., F.J.T., J.H., A.P., A.C.A. and S.J.B. are employees and stockholders of Eli Lilly and Company. K.W., R.B., L.K., S.J.H., S.S., B.C.B, and E.F. are employees of AbCellera Biologics Inc. C.L.H., R.G., D.P., P.X., Y.H., R.B., K.R.J. M.A.S., S.Z., D.W.C., and S.A.T. are employees and stockholders of AbCellera Biologics Inc.. K.M. is a former employee and stockholder of AbCellera Biologics Inc. M.D. received a contract from Eli Lilly and Company to support the studies reported herein. Authors from AbCellera Biologics Inc., National Institute of Allergy and Infectious Diseases (K.S.C., B.S.G., and J.R.M.), and Eli Lilly and Company are inventors on patent applications related to the work described here. R.S.B., D.R.M., R.W.C., T.W.G, V.B., O.A., L.W., H.M.B., M.D.V., A.D., M.S., J.A.G., C.L.H., N.V.J., J.S.M., and D.W. declare no competing interests.